Chen Wenhao

Biography

Chen Wenhao is pursuing his Master of Philosophy degree in Hong Kong University of Science and Technology focusing on the laser sintering field. He completed
his Undergraduate in HKUST Mechanical and Aerospace Engineering. He is experienced in mechanical design, manufacturing and building robot system.

Abstract

In Selective Laser Melting (SLM) process, metal powder is melted by laser and rapidly solidified into solid. The most common
microstructure observed during rapid solidification process is the dendritic morphology. Real-time observation of the
dendritic forming process by experiment becomes difficult due to its invisibility. Modeling of the microstructure could evaluate
the transient grain growth and assist to control the melting condition for better mechanical performance. In this work, two sub
models are integrated to simulate the transient grain growth during SLM process. A macroscale three-dimensional thermal
model is first used to generate the temperature field. The temperature field is then imported to the two-dimensional integrated
Cellular Automata and Phase field (CAPF) model, which calculates the microscale dendritic growth feature and associated
solute redistribution. The simulation result exhibits the dendrite growth behavior verified by literature.